This might be a little hard to explain, so please bear with me.

I'm running Win 98 with a 800x600 screen. Everything is fine on bootup, the screen is bright and clear.

When I start a program up, strange things happen...

* The screen resizes itself slightly, to a different shape (longer and taller). When I say 'screen' I mean the overall picture that Windows produces

* The contrast also changes so that, in, for example, Internet Explorer, pages becomes decidedly hazy. This is a lot more noticable if I have the window full screen, 1/4 size windows look fine

* The screen changes shape and size when I scroll down a long page, and when I click on a menu

When I say 'resizes', it isn't anything dramatic, but it's enough to be really annoying.

If anyone possibly understands what I'm talking about, I'd be grateful for an explanation. Please tell me that it's a software problem... I can't afford a new monitor.

If you don't understand what on earth I'm talking about, let me know too, and I'll try to explain more clearly.

Many thanks

Paul